In this episode of Syntax, Wes and Scott jump into part 2 of their look at Rust for JavaScript developers, including variables in Rust, type systems in Rust, signed and unsigned integers, and more.
Show Notes
let x = 5; // x is immutable let mut x = 5; // x is mutable const MAX_POINTS: u32 = 100_000; // must be defined at compile time
- 10:42 Type System in Rust
- 15:52 Types in Rust
- 19:06 Why does Rust have signed and unsigned integers?
- 23:35 Slicing strings with &str
- 27:35 enum
- 27:55 struct
- 28:19 Vec
- 29:33 HashMap and HashSet
- 33:00 Converting Signed to Unsigned Numbers
let unsigned_value: u8 = 200; let signed_value: i8 = unsigned_value as i8;
- 36:12 What’s up with &str?
- 43:31 Rust error messages
- 45:28 What is a Struct?
struct User { username: String, email: String, sign_in_count: u64, active: bool, } // You can create an instance of a struct like this: let user1 = User { email: String::from("someone@example.com"), username: String::from("someusername123"), active: true, sign_in_count: 1, }; impl User { fn login(&mut self) { self.login_count += 1; } }
- 49:17 SIIIIICK ××× PIIIICKS ×××
××× SIIIIICK ××× PIIIICKS ×××
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